LAB SESSION 4: JDOM
===================

0.- Read the article that you can find at:
http://www-128.ibm.com/developerworks/java/library/j-jdom/

There is a local copy in 'lab4_en_example.tgz' (Simplify_XML_programming_with_JDOM.html).

The source code (with some minor modifications) is in the 'jdomExamples'
directory.

1.- Setting everything:

- JDOM
$ bash
$ wget http://www.jdom.org/dist/binary/archive/jdom-1.0.tar.gz
$ tar xzvf jdom-1.0.tar.gz

- XALAN & XERCES
$ wget http://apache.rediris.es/xml/xalan-j/binaries/xalan-j_2_7_0-bin-2jars.tar.gz
$ tar xzvf xalan-j_2_7_0-bin-2jars.tar.gz

- CLASSPATH
$ CLASSPATH=~/JDOM/xalan-j_2_7_0/xalan.jar:~/JDOM/xalan-j_2_7_0/xercesImpl.jar:~/JDOM/jdom-1.0/build/jdom.jar:.
$ export CLASSPATH

- COMPILE EXAMPLE
$ cd jdomExamples/
$ rm Article.class
$ javac Article.java

2.- Modify the example so it saves all the rental requests in an xml file.
The program should have the following options:
	- 'reset': Empties the list of requests.
	- 'rent': gets from the keyboard the rental information and adds it
		to the xml file.
	- 'list': lists all the rental requests in xml
	- 'xsl': lists all the rental requests in html (using an xsl to do the
		transformation)

HINTS AND TIPS:
---

- TO ACCESS TO ALL SUB-ELEMENTS OF AN ELEMENT: getChildren()

import java.util.List;
import java.util.Iterator;

    public static void accessChildElement(Document myDocument) {
        Element carsElement = myDocument.getRootElement();
	List cars = carsElement.getChildren();
	Iterator itr = cars.iterator();
	while (itr.hasNext()) {
	    Element carElement = (Element) itr.next();
	    Element yearElement = carElement.getChild("year");

		[...]
	}
    }

---

PRETTY FORMAT FOR XML:

import org.jdom.output.Format;

	[...]
        XMLOutputter outputter = new XMLOutputter(Format.getPrettyFormat());
	[...]

---

READING FROM KEYBOARD:

import java.io.BufferedReader;
import java.io.InputStreamReader;

	[...]
	BufferedReader stdin = new BufferedReader
	    (new InputStreamReader(System.in));

	try {
	    String m;
	    System.out.print ("Type your name: ");
	    System.out.flush();
	    m = stdin.readLine();
	} catch (java.io.IOException e) {
            e.printStackTrace();
        }
	[...]

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HERE IS AN EXPLANATION OF WHAT "car vin" is:
http://www.vehicleidentificationnumber.com/vehicle_identification_numbers_vin_detail.html

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